<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      <ul>
        <li v-for="(item,index) in list" :key="index">{{item}}</li>
      </ul>
      <button @click="walk">走一走</button>
    </div>
    <script src="../js/vue.js"></script>
    <script>
      const app = new Vue({
        el: "#app",
        data:{
            list:['程序员','美女','帅哥']
        },
        methods:{
            walk(){
                let personList = this.list.splice(0,1)
                this.list.push(personList[0])
            }
        }
      });
    </script>
  </body>
</html>
